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                            <div class="member-list" data-type="methods">
                                <span class="subtitle">Methods</span>
                                <ul>
                                    <li data-name="drawcircle"><a
                                            href="module-ol_render_canvas_Immediate-CanvasImmediateRenderer.html#drawCircle">drawCircle</a>
                                    <li data-name="drawfeature"><a
                                            href="module-ol_render_canvas_Immediate-CanvasImmediateRenderer.html#drawFeature">drawFeature</a>
                                    <li data-name="drawgeometry"><a
                                            href="module-ol_render_canvas_Immediate-CanvasImmediateRenderer.html#drawGeometry">drawGeometry</a>
                                    <li data-name="setstyle"><a
                                            href="module-ol_render_canvas_Immediate-CanvasImmediateRenderer.html#setStyle">setStyle</a>
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                <h1 class="page-title" data-filename="module-ol_render_canvas_Immediate-CanvasImmediateRenderer.html">
                    Class: CanvasImmediateRenderer</h1>
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                    This documentation is for OpenLayers v<span id="package-version">8.2.0</span>. The <a
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                <section class="content">

                    <header>
                        <h2 class="my-3">
                            <span class="ancestors"><a
                                    href="module-ol_render_canvas_Immediate.html">ol/render/canvas/Immediate</a>~</span>CanvasImmediateRenderer
                        </h2>
                        <br>

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                            <div class="class-description col-lg-7 align-self-center ps-0">
                                <p>这是 <a
                                        href="module-ol_render_VectorContext-VectorContext.html"><code>VectorContext</code></a>
                                    的一个具体子类，它实现了将特性和几何图形直接渲染到 HTML5 Canvas 上下文中的功能。这个类的实例由库内部创建，并作为与图层和地图发出的
                                    postcompose、precompose 和 render 事件相关的
                                    <a href="module-ol_render_Event-RenderEvent.html"><code>RenderEvent</code></a>
                                    对象的 vectorContext 成员提供给应用程序代码。
                                </p>
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                    <article>
                        <div class="container-overview">



                            <dl>

                                <dt class="">


                                </dt>
                                <dd class="">












                                    <dl class="details">





















                                    </dl>













                                </dd>

                            </dl>

                        </div>




                        <h3 class="subsection-title">Extends</h3>

                        <ul>
                            <li><a href="module-ol_render_VectorContext-VectorContext.html">VectorContext</a></li>
                        </ul>















                        <h3 class="subsection-title">Methods</h3>

                        <dl>


                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="drawCircle">
                                    </div>
                                    <h4 class="name">
                                        drawCircle<span class="signature">(geometry)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js">render/canvas/Immediate.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js#L489">line
                                            489</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>在画布上渲染圆形几何图形。渲染是立即执行的，并使用当前的填充和描边样式。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>geometry</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_geom_Circle-Circle.html">Circle</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Circle geometry.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="drawFeature">
                                    </div>
                                    <h4 class="name">
                                        drawFeature<span class="signature">(feature, style)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js">render/canvas/Immediate.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js#L625">line
                                            625</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>在画布上渲染特性。请注意，提供的样式中的任何<code>zIndex</code> 都将被忽略——特性将按照调用此方法的顺序立即渲染。如果你需要支持，你应该使用
                                        <a href="module-ol_layer_Vector-VectorLayer.html"><code>VectorLayer</code></a>
                                        .
                                    </p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>feature</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_Feature-Feature.html">Feature</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Feature.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>style</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_style_Style-Style.html">Style</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Style.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="drawGeometry">
                                    </div>
                                    <h4 class="name">
                                        drawGeometry<span class="signature">(geometry)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js">render/canvas/Immediate.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js#L564">line
                                            564</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>在画布上渲染几何图形。首先调用
                                        <a
                                            href="module-ol_render_canvas_Immediate-CanvasImmediateRenderer.html#setStyle"><code>renderer.setStyle()</code></a>
                                        来设置渲染样式。
                                    </p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>geometry</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_geom_Geometry-Geometry.html">Geometry</a></span>
                                                |

                                                <span class="param-type"><a
                                                        href="module-ol_render_Feature-RenderFeature.html">RenderFeature</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>The geometry to render.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id="setStyle">
                                    </div>
                                    <h4 class="name">
                                        setStyle<span class="signature">(style)</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js">render/canvas/Immediate.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/render/canvas/Immediate.js#L544">line
                                            544</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">




                                <div class="description">
                                    <p>设置渲染样式。请注意，由于这是一个立即渲染的 API，提供的样式中的任何 <code>zIndex</code>都将被忽略。
                                    </p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>style</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_style_Style-Style.html">Style</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>The rendering style.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>













                            </dd>

                        </dl>





                    </article>

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